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Showing 1 to 13 of 13 for “"Step-scan"”.
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Developing Time-Resolved Synchrotron Infrared Spectroscopy for Spectroelectrochemical Measurements
… electrocatalytic processes with rapid scan FTIR in reflection mode. The thesis demonstrates application of SIR-based rapid scan FTIR to spatially map catalytic activity on heterogenous PtNi electrode and provides proof-of-principle for its capability for combinatorial screening for …
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A cold strontium Rydberg gas
… Rydberg states, and have developed a sensitive ``step-scan" spectroscopic technique that detects the spontaneous ionization of the Rydberg gas. The step-scan method is used to acquire Stark maps, and these measurements verify a single-electron model for calculating dipole matrix-elements. From the …
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High-bandwidth high-precision robust x-ray microscopy - a control systems approach
… on maintaining a precise position of the optics scanning stages in the XY lateral plane relative to the sample stages, which will ensure that the optics stages scans the focused X-ray spot on the sample along a predefined trajectory. We would also want to maintain a precise relative distance …
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Untersuchung des lichtgetriebenen Chloridtransports in Halorhodopsin aus Natronobacterium pharaonis mit statischer und zeitaufgelöster FTIR-Spektroskopie
… wie ATR, bis hin zur zeitaufgelösten Step-Scan-Technik) wurde die lichtgetriebene Chloridpumpe Halorhodopsin aus dem extrem halophilen Archaeabakterium Natronobacterium pharaonis (pHR) näher untersucht. <br>Das Hauptaugenmerk richtete sich auf die Anionenbindungsstelle und damit …
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X-ray study of the stacking fault density near the hardness maximum of the Au-Ag-Pd system
… lattice parameter for a given reflection from step scan data by obtaining midpoints of a peak at various heights above background. Line shape analysis has been performed for one specimen, with the result that the deformation fault density thus obtained agrees well with that obtained from the …
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Surface Effects on Anchoring and Dynamical Interactions of Liquid Crystalline Films
… polarized Fourier-transform infrared (FTIR) and step-scan time-resolved vibrational (TRS) spectroscopies. Surface-induced alignments and electro-optical dynamics of these systems are examined in a systematic manner, in a cell whose geometry enables thorough investigation of orientational …
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The Electro -Optical Dynamics of Nanoscale Liquid Crystalline Mesophases
… polarized Fourier-transform infrared (FTIR) and step-scan time-resolved (TRS) vibrational spectroscopies. A simple coarse-grained statistical dynamical model was presented to provide both qualitative and quantitative understandings of these behaviors. In the experiments detailed in this work, new …
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Characterization of Cure Kinetics and Physical Properties of a High Performance, Glass Fiber-Reinforced Epoxy Prepreg and a Novel Fluorine-Modified, Amine-Cured Commercial Epoxy.
… by heat generated determined by differential scanning calorimetry (DSC) and by high speed DSC when the reaction rate is high. The changes in physical properties indicating increasing conversion are followed by shifts in glass transition temperature determined by DSC, temperature-modulated DSC …
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Fourier Transform Infrared Spectroscopy for the measurement of GeSn/(Si)GeSn
… for a wider spectral range detection. Finally, a step-scan mode of operation which required both lock-in and a chopper was used to measure various GeSn bulk and laser samples at high resolution. The results obtained from these characterizations demonstrate a high SNR spectrum compared to a …
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Design, construction and commissioning of an apparatus to perform frequency response diffusivity measurements and high time-resolution ftir spectroscopy
… diffusion of reactants and products is often the step that determines both the reaction rate and selectivity. Thus, knowledge of the diffusion rates, and of the diffusional behaviour of molecules within zeolites, is of primary importance in the understanding of these phenomena. While several …
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Development of intersubband terahertz lasers using multiple quantum well structures
… spectral measurement techniques are critical steps in achieving this goal. Conduction-band three-level subband systems in triple-quantum-well structures using GaAs/Alo.3Gao.7As heterostructures were proposed, designed, and simulated by a numerical method. The numerical simulation is a …
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FTIR Spectroscopy of the photophobic sensory rhodopsin II/transducer complex from natronabacterium pharaonis
… Messungen bei Raumtemperatur als auch bei step-scan Messungen zuverlässige Daten zu erhalten, wurden die Untersuchungen auf niedrige Temperaturen (K-Intermediate) und rapid-scan Messungen (M2-Intermediat) beschränkt. <br>Von Hauptinteresse war das Aufspüren von Konformationsänderungen, die …
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Semiconductor quantum dots for mid-IR light emission
… by temperature- and power- dependent infrared step-scan photoluminescence spectroscopy. The epitaxial In(Ga)Sb layers are observed to form either quantum wells, quantum dots, or disordered quantum wells, depending on the insertion layer and substrate material composition. The observed optical …